/**
    * This file Copyright (c) 2010-2010 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia.info/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.groovy.console;
  
  import java.io.Serializable;
  
  import info.magnolia.cms.beans.config.ContentRepository;
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.cms.util.HierarchyManagerWrapper;
  import info.magnolia.context.Context;
  import info.magnolia.context.ContextDecorator;
  import info.magnolia.context.DefaultRepositoryStrategy;
  import info.magnolia.context.RepositoryAcquiringStrategy;
  import info.magnolia.context.SystemContext;
  import info.magnolia.context.SystemRepositoryStrategy;
  import info.magnolia.context.UserContext;
  import info.magnolia.module.groovy.support.nodes.MgnlGroovyNode;
  
  
  /**
   * Custom context which returns a special version of {@link HierarchyManager} wrapping content as {@link MgnlGroovyNode}.
   * @author pbaerfuss
   * @version $Id$
   *
   */
  public class MgnlGroovyConsoleContext extends ContextDecorator {
  
      private static final class InternalHierarchyManagerWrapper extends
          HierarchyManagerWrapper {
          private InternalHierarchyManagerWrapper(HierarchyManager wrappedHM) {
              super(wrappedHM);
          }
  
          @Override
          protected Content wrap(Content content) {
              return new MgnlGroovyNode(content);
          }
      }
      //need this to avoid warning when setting strategy as session attribute in context
      private static final class SerializableRepositoryStrategy extends DefaultRepositoryStrategy implements Serializable {
          private static final long serialVersionUID = 1L;
  
          public SerializableRepositoryStrategy(UserContext context) {
              super(context);
          }
      }
  
      private static final long serialVersionUID = 1L;
  
      private static final String STRATEGY_ATTRIBUTE = MgnlGroovyConsole.class.getName() + ".strategy";
  
      public MgnlGroovyConsoleContext(Context ctx) {
          super(ctx);
      }
  
      public RepositoryAcquiringStrategy getRepositoryStrategy() {
  
          RepositoryAcquiringStrategy strategy = (RepositoryAcquiringStrategy) getAttribute(STRATEGY_ATTRIBUTE, Context.SESSION_SCOPE);
          if (strategy == null) {
              //this is only needed by the the MgnlGroovyRescueServlet (that is in exceptional cases, when you're in dire straits)
              //as operations there are executed in SystemContext
              if(SystemContext.class.isAssignableFrom(ctx.getClass())){
                  strategy = new SystemRepositoryStrategy((SystemContext) ctx);
              } else {
                  strategy = new SerializableRepositoryStrategy((UserContext) ctx);
              }
              setAttribute(STRATEGY_ATTRIBUTE, strategy, Context.SESSION_SCOPE);
         }
         return strategy;
     }
 
     @Override
     public HierarchyManager getHierarchyManager(String repositoryId) {
         final HierarchyManager hm = getHierarchyManager(repositoryId, ContentRepository.getDefaultWorkspace(repositoryId));
         return new InternalHierarchyManagerWrapper(hm);
     }
 
     @Override
     public HierarchyManager getHierarchyManager(String repositoryId, String workspaceId) {
         return getRepositoryStrategy().getHierarchyManager(repositoryId, workspaceId);
     }
 
 }